Obtain a glass prism or a diffraction grating, available from science museum stores, catalogs, or your physics department. Look through the prism or grating at various light sources, such as an...

Obtain a glass prism or a diffraction grating, available from science museum stores, catalogs, or your physics department. Look through the prism or grating at various light sources, such as an ordinary incandescent lightbulb, a neon sign, and a mercury vapor street lamp. Do not look at the Sun! Looking directly at the Sun causes blindness. Do you have any trouble seeing spectra? What do you have to do to see a spectrum? Describe the differences in the spectra of the various light sources you observed.